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1 In order to achieve the purity of choice for Small Tail Han sheep, the purity of the selected seeds must be determined when introducing the varieties:
1.1 Morphological Standards 1 The ram has a large skull, a thick neck, and a pair of large, spiral-shaped horns on the head; the ewes have small heads, fine necks, and 2 small horns or no horns on their heads. 2 The limbs are high-spirited, well-balanced, and slender, with a cylindrical shape. 3 The tail is hypertrophied and has a circular fan shape.
1.2 The characteristics of the hair type 1 suede type. This group accounts for about 55% to 90% of the group composition. It is characterized by clear hair strands, obvious flower bends, and a high lambing rate. 2 fine hair type. About 10% to 14% of the group composition is characterized by capillary and dense, smaller flower bends, and lower lambing rate. 3 rough type. Less than 10% of the group composition is characterized by thick hair, large flowers, and middle lambing rate.
1.3 Breeding characteristics Purebred small-tail Han sheep estrus is more concentrated in spring and autumn. The early-during rams are 8 months old, ewes are 6- 7 months old, the estrus cycle is 16-18 days, and the estrus lasts 24-36 hours. The average is about 150 days and the average number of litters born is 2.5. The average weight of newborn lambs is 3.5kg, and the weaning survival rate is above 90%.
2 Raising the survival rate of lambs
2.1 Ewe control of pregnancy weight Under normal circumstances, the ewes 6 months of age can be estrus mating, estrus sheep showed redness and congestion of the vulva, there is mucus outflow from the vulva, there is a cross-reflection phenomenon. At this time, it is the best "fire" for breeding and it is necessary to seize the opportunity to breed. The virgin sheep had obvious estrus, and they refused to cross. When they refused, they had to stand on Baoding. If you don't have one at a time, you can take multiple breedings. Grazing sheep are mainly grazing, supplemented by grazing or fully fed. Feed high-quality feeds to ensure their nutritional needs. Management of gravid sheep should be strengthened, and mountain areas should avoid grazing on steep slopes to prevent miscarriage. In winter, pregnant ewes should be fed warm water. Do not drink water with ice slag.
2.2 Lambing and Nursing Care After educating the ewes for delivery, let the ewes pick up the fetal water from the lambs and warm them when the weather is cold. For the newly born lamb, the confinement person must put his index finger into the lamb's mouth, allow him to suck for a while, and promptly allow the lamb to eat colostrum. Colostrum is rich in antibodies, magnesium and other substances, can enhance the lamb's immunity against the disease and promote meconium discharge. When the ewes are overweight, the teats and milk are relatively inadequate, artificial feeding is the best way. Fresh milk, powdered milk or millet soup will be put into the bottle to feed the lamb.
2.3 Lamb Diseases Severe disease prevention Lamb common diseases include iron deficiency, selenium-nutrient diarrhea, and bacterial diarrhea. In this regard, under the guidance of veterinarians should be applied to the prevention and treatment of iron sulfide preparations and the addition of trace elements such as selenium, and bacillary dysentery should be treated with drugs in time.
3 Fasting the good rams to develop herbivorous small-tailed sheep is a rich project with low investment and quick results. Lambs can be quickly fattened after weaning, slaughtered after six months, weighing up to 75kg, the net meat rate of 42% or more, each lamb can produce more than 32kg of net meat, plus the value of sheepskin, considerable benefits. If you buy fat lambs for fattening, it will be very profitable to deduct the cost of hay, and it will be a short, flat and fast project to get rid of poverty. The technical points of its rapid fattening are as follows:
3.1 When a reasonable group buys sheep, try to select the same age and size to facilitate the management and matching of feed.
3.2 Supplementing the concentrated material Small-tailed Han sheep have the characteristics of rapid growth and development, and a large demand for nutrient components, so it is absolutely necessary to feed nutritionally comprehensive compound feed. The concentrate feed is supplied at a weight of 1% to 1.5%, and the concentrate and grass powder are fed together and fed together at night.
3.3 Disease prevention and deworming sheep quadruple or triple vaccine, each subcutaneous injection 5mL uniform to drive off the internal parasite, available propylthiofinazole (also known as anti-creep sensitivity, intestinal worm clear), per kg body weight 10 to 20mL fasting gavage Once a day, even for 3 days. Sulphur didichlorophenol can also be used, 75 to 100 mg per kilogram body weight, 1 oral.
3.4 Feeding enough water Drink 20 to 30°C warm water in winter, and add 10 to 15 g of salt per sheep per day in the water.
3.5 Take a arbor in summer for reasonable exercise, and fertility for winter in a warm circle. The sheep house should be clean and fresh air. Feeding mainly to house feeding, the sheep should be driven to the roadside and ditching twice a day for 1 hour each time.